[PATCH linux dev-4.10 v2 6/8] hwmon: Remove MAX31785 implementation
Andrew Jeffery
andrew at aj.id.au
Thu Jul 27 19:57:15 AEST 2017
An implementation based on the pmbus subsystem will be introduced
Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
Signed-off-by: Joel Stanley <joel at jms.id.au>
---
drivers/hwmon/Kconfig | 10 -
drivers/hwmon/Makefile | 1 -
drivers/hwmon/max31785.c | 893 -----------------------------------------------
3 files changed, 904 deletions(-)
delete mode 100644 drivers/hwmon/max31785.c
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index dae67c2be1a5..9256dd059321 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -895,16 +895,6 @@ config SENSORS_MAX6697
This driver can also be built as a module. If so, the module
will be called max6697.
-config SENSORS_MAX31785
- tristate "Maxim MAX31785 sensor chip"
- depends on I2C
- help
- If you say yes here you get support for 6-Channel PWM-Output
- Fan RPM Controller.
-
- This driver can also be built as a module. If so, the module
- will be called max31785.
-
config SENSORS_MAX31790
tristate "Maxim MAX31790 sensor chip"
depends on I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 4b7c15fbda6c..98000fc2e902 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -120,7 +120,6 @@ obj-$(CONFIG_SENSORS_MAX6639) += max6639.o
obj-$(CONFIG_SENSORS_MAX6642) += max6642.o
obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
-obj-$(CONFIG_SENSORS_MAX31785) += max31785.o
obj-$(CONFIG_SENSORS_MAX31790) += max31790.o
obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
diff --git a/drivers/hwmon/max31785.c b/drivers/hwmon/max31785.c
deleted file mode 100644
index 011354df587d..000000000000
--- a/drivers/hwmon/max31785.c
+++ /dev/null
@@ -1,893 +0,0 @@
-/*
- * max31785.c - Part of lm_sensors, Linux kernel modules for hardware
- * monitoring.
- *
- * (C) 2016 Raptor Engineering, LLC
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/err.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/i2c.h>
-#include <linux/init.h>
-#include <linux/jiffies.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-
-/* MAX31785 device IDs */
-#define MAX31785_MFR_ID 0x4d
-#define MAX31785_MFR_MODEL 0x53
-
-/* MAX31785 registers */
-#define MAX31785_REG_PAGE 0x00
-#define MAX31785_PAGE_FAN_CONFIG(ch) (0x00 + (ch))
-#define MAX31785_REG_FAN_CONFIG_1_2 0x3a
-#define MAX31785_REG_FAN_COMMAND_1 0x3b
-#define MAX31785_REG_STATUS_FANS_1_2 0x81
-#define MAX31785_REG_FAN_SPEED_1 0x90
-#define MAX31785_REG_MFR_ID 0x99
-#define MAX31785_REG_MFR_MODEL 0x9a
-#define MAX31785_REG_MFR_REVISION 0x9b
-#define MAX31785_REG_MFR_FAULT_RESP 0xd9
-#define MAX31785_REG_MFR_FAN_CONFIG 0xf1
-#define MAX31785_REG_MFR_FAN_CONFIG_DUAL_TACH BIT(12)
-#define MAX31785_REG_READ_FAN_PWM 0xf3
-
-/* Fan Config register bits */
-#define MAX31785_FAN_CFG_PWM_ENABLE 0x80
-#define MAX31785_FAN_CFG_CONTROL_MODE_RPM 0x40
-#define MAX31785_FAN_CFG_PULSE_MASK 0x30
-#define MAX31785_FAN_CFG_PULSE_SHIFT 4
-#define MAX31785_FAN_CFG_PULSE_OFFSET 1
-
-/* Fan Status register bits */
-#define MAX31785_FAN_STATUS_FAULT_MASK 0x80
-
-/* Fault response register bits */
-#define MAX31785_FAULT_PIN_MONITOR BIT(0)
-
-/* Fan Command constants */
-#define MAX31785_FAN_COMMAND_PWM_RATIO 40
-
-#define NR_CHANNEL 6
-
-/* Addresses to scan */
-static const unsigned short normal_i2c[] = {
- 0x52, 0x53, 0x54, 0x55,
- I2C_CLIENT_END
-};
-
-#define MAX31785_CAP_FAST_ROTOR BIT(0)
-
-/*
- * Client data (each client gets its own)
- *
- * @lock: Protects device access and access to cached values
- * @valid: False until fields below it are valid
- * @last_updated: Last update time in jiffies
- */
-struct max31785 {
- struct i2c_client *client;
- struct mutex lock;
- bool valid;
- unsigned long last_updated;
- u32 capabilities;
-
- /* Registers */
- u8 fan_config[NR_CHANNEL];
- u16 fan_command[NR_CHANNEL];
- u16 mfr_fan_config[NR_CHANNEL];
- u8 fault_status[NR_CHANNEL];
- u16 pwm[NR_CHANNEL];
- u16 tach_rpm[NR_CHANNEL * 2];
-};
-
-static inline bool max31785_has_dual_rotor(struct max31785 *data)
-{
- return !!(data->capabilities & MAX31785_CAP_FAST_ROTOR);
-}
-
-static int max31785_set_page(struct i2c_client *client,
- u8 page)
-{
- return i2c_smbus_write_byte_data(client, MAX31785_REG_PAGE, page);
-}
-
-static int read_fan_data(struct i2c_client *client, u8 fan, u8 reg,
- s32 (*read)(const struct i2c_client *, u8))
-{
- int rv;
-
- rv = max31785_set_page(client, MAX31785_PAGE_FAN_CONFIG(fan));
- if (rv < 0)
- return rv;
-
- return read(client, reg);
-}
-
-static inline int max31785_read_fan_byte(struct i2c_client *client, u8 fan,
- u8 reg)
-{
- return read_fan_data(client, fan, reg, i2c_smbus_read_byte_data);
-}
-
-static inline int max31785_read_fan_word(struct i2c_client *client, u8 fan,
- u8 reg)
-{
- return read_fan_data(client, fan, reg, i2c_smbus_read_word_data);
-}
-
-static int max31785_write_fan_byte(struct i2c_client *client, u8 fan,
- u8 reg, u8 data)
-{
- int err;
-
- err = max31785_set_page(client, MAX31785_PAGE_FAN_CONFIG(fan));
- if (err < 0)
- return err;
-
- return i2c_smbus_write_byte_data(client, reg, data);
-}
-
-static int max31785_write_fan_word(struct i2c_client *client, u8 fan,
- u8 reg, u16 data)
-{
- int err;
-
- err = max31785_set_page(client, MAX31785_PAGE_FAN_CONFIG(fan));
- if (err < 0)
- return err;
-
- return i2c_smbus_write_word_data(client, reg, data);
-}
-
-/* Cut down version of i2c_smbus_xfer_emulated(), reading 4 bytes */
-static s64 max31785_smbus_read_long_data(struct i2c_client *client, u8 command)
-{
- unsigned char cmdbuf[1];
- unsigned char rspbuf[4];
- s64 rc;
-
- struct i2c_msg msg[2] = {
- {
- .addr = client->addr,
- .flags = 0,
- .len = sizeof(cmdbuf),
- .buf = cmdbuf,
- },
- {
- .addr = client->addr,
- .flags = I2C_M_RD,
- .len = sizeof(rspbuf),
- .buf = rspbuf,
- },
- };
-
- cmdbuf[0] = command;
-
- rc = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
- if (rc < 0)
- return rc;
-
- rc = (rspbuf[0] << (0 * 8)) | (rspbuf[1] << (1 * 8)) |
- (rspbuf[2] << (2 * 8)) | (rspbuf[3] << (3 * 8));
-
- return rc;
-}
-
-static int max31785_update_fan_speed(struct max31785 *data, u8 fan)
-{
- s64 rc;
-
- rc = max31785_set_page(data->client, MAX31785_PAGE_FAN_CONFIG(fan));
- if (rc)
- return rc;
-
- if (max31785_has_dual_rotor(data)) {
- rc = max31785_smbus_read_long_data(data->client,
- MAX31785_REG_FAN_SPEED_1);
- if (rc < 0)
- return rc;
-
- data->tach_rpm[fan] = rc & 0xffff;
- data->tach_rpm[NR_CHANNEL + fan] = (rc >> 16) & 0xffff;
-
- return rc;
- }
-
- rc = i2c_smbus_read_word_data(data->client, MAX31785_REG_FAN_SPEED_1);
- if (rc < 0)
- return rc;
-
- data->tach_rpm[fan] = rc;
-
- return rc;
-}
-
-static inline bool is_automatic_control_mode(struct max31785 *data,
- int index)
-{
- return data->fan_command[index] > 0x7fff;
-}
-
-static struct max31785 *max31785_update_device(struct device *dev)
-{
- struct max31785 *data = dev_get_drvdata(dev);
- struct i2c_client *client = data->client;
- struct max31785 *ret = data;
- int rv;
- int i;
-
- mutex_lock(&data->lock);
-
- if (!time_after(jiffies, data->last_updated + HZ) && data->valid) {
- mutex_unlock(&data->lock);
-
- return ret;
- }
-
- for (i = 0; i < NR_CHANNEL; i++) {
- rv = max31785_read_fan_byte(client, i,
- MAX31785_REG_STATUS_FANS_1_2);
- if (rv < 0)
- goto abort;
- data->fault_status[i] = rv;
-
- rv = max31785_update_fan_speed(data, i);
- if (rv < 0)
- goto abort;
-
- if ((data->fan_config[i] & MAX31785_FAN_CFG_CONTROL_MODE_RPM)
- || is_automatic_control_mode(data, i)) {
- rv = max31785_read_fan_word(client, i,
- MAX31785_REG_READ_FAN_PWM);
- if (rv < 0)
- goto abort;
- data->pwm[i] = rv;
- }
-
- if (!is_automatic_control_mode(data, i)) {
- /*
- * Poke watchdog for manual fan control
- *
- * XXX (AJ): This isn't documented in the MAX31785
- * datasheet, or anywhere else it seems.
- */
- rv = max31785_write_fan_word(client,
- i, MAX31785_REG_FAN_COMMAND_1,
- data->fan_command[i]);
- if (rv < 0)
- goto abort;
- }
- }
-
- data->last_updated = jiffies;
- data->valid = true;
-
- mutex_unlock(&data->lock);
-
- return ret;
-
-abort:
- data->valid = false;
-
- mutex_unlock(&data->lock);
-
- return ERR_PTR(rv);
-
-}
-
-static ssize_t max31785_fan_set_target(struct max31785 *data, int channel,
- long rpm)
-{
- int rc;
-
- if (rpm > 0x7fff)
- return -EINVAL;
-
- mutex_lock(&data->lock);
-
- data->fan_config[channel] |= MAX31785_FAN_CFG_CONTROL_MODE_RPM;
- rc = max31785_write_fan_byte(data->client, channel,
- MAX31785_REG_FAN_CONFIG_1_2,
- data->fan_config[channel]);
-
- /* Write new RPM value */
- data->fan_command[channel] = rpm;
- rc = max31785_write_fan_word(data->client, channel,
- MAX31785_REG_FAN_COMMAND_1,
- data->fan_command[channel]);
-
- mutex_unlock(&data->lock);
-
- return rc;
-}
-
-static ssize_t max31785_fan_set_pulses(struct max31785 *data, int channel,
- long pulses)
-{
- int rc;
-
- if (pulses > 4)
- return -EINVAL;
-
- mutex_lock(&data->lock);
-
- /* XXX (AJ): This sequence disables the fan and sets in PWM mode */
- data->fan_config[channel] &= MAX31785_FAN_CFG_PULSE_MASK;
- data->fan_config[channel] |= ((pulses - MAX31785_FAN_CFG_PULSE_OFFSET)
- << MAX31785_FAN_CFG_PULSE_SHIFT);
-
- /* Write new pulse value */
- rc = max31785_write_fan_byte(data->client, channel,
- MAX31785_REG_FAN_CONFIG_1_2,
- data->fan_config[channel]);
-
- mutex_unlock(&data->lock);
-
- return rc;
-}
-
-static ssize_t max31785_pwm_set(struct max31785 *data, int channel, long pwm)
-{
- int rc;
-
- if (pwm > 255)
- return -EINVAL;
-
- mutex_lock(&data->lock);
-
- data->fan_config[channel] &= ~MAX31785_FAN_CFG_CONTROL_MODE_RPM;
- rc = max31785_write_fan_byte(data->client, channel,
- MAX31785_REG_FAN_CONFIG_1_2,
- data->fan_config[channel]);
-
- /* Write new PWM value */
- data->fan_command[channel] = pwm * MAX31785_FAN_COMMAND_PWM_RATIO;
- rc = max31785_write_fan_word(data->client, channel,
- MAX31785_REG_FAN_COMMAND_1,
- data->fan_command[channel]);
-
- mutex_unlock(&data->lock);
-
- return rc;
-}
-
-static ssize_t max31785_pwm_enable(struct max31785 *data, int channel,
- long mode)
-{
- struct i2c_client *client = data->client;
- int rc;
-
- mutex_lock(&data->lock);
-
- switch (mode) {
- case 0:
- data->fan_config[channel] =
- data->fan_config[channel]
- & ~MAX31785_FAN_CFG_PWM_ENABLE;
- break;
- case 1: /* fallthrough */
- case 2: /* fallthrough */
- case 3:
- data->fan_config[channel] =
- data->fan_config[channel]
- | MAX31785_FAN_CFG_PWM_ENABLE;
- break;
- default:
- rc = -EINVAL;
- goto done;
-
- }
-
- switch (mode) {
- case 0:
- break;
- case 1:
- data->fan_config[channel] =
- data->fan_config[channel]
- & ~MAX31785_FAN_CFG_CONTROL_MODE_RPM;
- break;
- case 2:
- data->fan_config[channel] =
- data->fan_config[channel]
- | MAX31785_FAN_CFG_CONTROL_MODE_RPM;
- break;
- case 3:
- data->fan_command[channel] = 0xffff;
- break;
- default:
- rc = -EINVAL;
- goto done;
- }
-
- rc = max31785_write_fan_byte(client, channel,
- MAX31785_REG_FAN_CONFIG_1_2,
- data->fan_config[channel]);
-
- if (!rc)
- rc = max31785_write_fan_word(client, channel,
- MAX31785_REG_FAN_COMMAND_1,
- data->fan_command[channel]);
-
-done:
- mutex_unlock(&data->lock);
-
- return rc;
-}
-
-static int max31785_init_fans(struct max31785 *data)
-{
- struct i2c_client *client = data->client;
- int i, rv;
-
- for (i = 0; i < NR_CHANNEL; i++) {
- rv = max31785_read_fan_byte(client, i,
- MAX31785_REG_FAN_CONFIG_1_2);
- if (rv < 0)
- return rv;
- data->fan_config[i] = rv;
-
- rv = max31785_read_fan_word(client, i,
- MAX31785_REG_FAN_COMMAND_1);
- if (rv < 0)
- return rv;
- data->fan_command[i] = rv;
-
- rv = max31785_read_fan_word(client, i,
- MAX31785_REG_MFR_FAN_CONFIG);
- if (rv < 0)
- return rv;
- data->mfr_fan_config[i] = rv;
-
- if (max31785_has_dual_rotor(data)) {
- rv |= MAX31785_REG_MFR_FAN_CONFIG_DUAL_TACH;
- data->mfr_fan_config[i] = rv;
-
- rv = max31785_write_fan_word(client, i,
- MAX31785_REG_MFR_FAN_CONFIG,
- data->mfr_fan_config[i]);
- if (rv < 0)
- return rv;
- }
-
- if (!((data->fan_config[i]
- & MAX31785_FAN_CFG_CONTROL_MODE_RPM)
- || is_automatic_control_mode(data, i))) {
- data->pwm[i] = 0;
- }
- }
-
- return 0;
-}
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int max31785_detect(struct i2c_client *client,
- struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
- int rv;
-
- if (!i2c_check_functionality(adapter,
- I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
- return -ENODEV;
-
- /* Probe manufacturer / model registers */
- rv = i2c_smbus_read_byte_data(client, MAX31785_REG_MFR_ID);
- if (rv < 0)
- return -ENODEV;
- if (rv != MAX31785_MFR_ID)
- return -ENODEV;
-
- rv = i2c_smbus_read_byte_data(client, MAX31785_REG_MFR_MODEL);
- if (rv < 0)
- return -ENODEV;
- if (rv != MAX31785_MFR_MODEL)
- return -ENODEV;
-
- strlcpy(info->type, "max31785", I2C_NAME_SIZE);
-
- return 0;
-}
-
-static const u32 max31785_fan_config_0x3030[] = {
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- 0
-};
-
-static const struct hwmon_channel_info max31785_fan_0x3030 = {
- .type = hwmon_fan,
- .config = max31785_fan_config_0x3030,
-};
-
-static const u32 max31785_fan_config_0x3040[] = {
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT | HWMON_F_PULSES | HWMON_F_TARGET | HWMON_F_FAULT,
- HWMON_F_INPUT,
- HWMON_F_INPUT,
- HWMON_F_INPUT,
- HWMON_F_INPUT,
- HWMON_F_INPUT,
- HWMON_F_INPUT,
- 0
-};
-
-static const struct hwmon_channel_info max31785_fan_0x3040 = {
- .type = hwmon_fan,
- .config = max31785_fan_config_0x3040,
-};
-
-static const u32 max31785_pwm_config[] = {
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
- 0,
-};
-
-static const struct hwmon_channel_info max31785_pwm = {
- .type = hwmon_pwm,
- .config = max31785_pwm_config
-};
-
-static const struct hwmon_channel_info *max31785_info_0x3030[] = {
- &max31785_fan_0x3030,
- &max31785_pwm,
- NULL,
-};
-
-static const struct hwmon_channel_info *max31785_info_0x3040[] = {
- &max31785_fan_0x3040,
- &max31785_pwm,
- NULL,
-};
-
-static int max31785_read_fan(struct max31785 *data, u32 attr, int channel,
- long *val)
-{
- int rc = 0;
-
- switch (attr) {
- case hwmon_fan_pulses:
- {
- long pulses;
-
- pulses = data->fan_config[channel];
- pulses &= MAX31785_FAN_CFG_PULSE_MASK;
- pulses >>= MAX31785_FAN_CFG_PULSE_SHIFT;
- pulses += MAX31785_FAN_CFG_PULSE_OFFSET;
-
- *val = pulses;
- break;
- }
- case hwmon_fan_target:
- {
- long target;
-
- mutex_lock(&data->lock);
-
- target = data->fan_command[channel];
-
- if (!(data->fan_config[channel] &
- MAX31785_FAN_CFG_CONTROL_MODE_RPM))
- target /= MAX31785_FAN_COMMAND_PWM_RATIO;
-
- *val = target;
-
- mutex_unlock(&data->lock);
-
- break;
- }
- case hwmon_fan_input:
- *val = data->tach_rpm[channel];
- break;
- case hwmon_fan_fault:
- *val = !!(data->fault_status[channel] &
- MAX31785_FAN_STATUS_FAULT_MASK);
- break;
- default:
- rc = -EOPNOTSUPP;
- break;
- };
-
- return rc;
-}
-
-static int max31785_read_pwm(struct max31785 *data, u32 attr, int channel,
- long *val)
-{
- bool is_auto;
- bool is_rpm;
- int rc = 0;
-
- mutex_lock(&data->lock);
-
- is_rpm = !!(data->fan_config[channel] &
- MAX31785_FAN_CFG_CONTROL_MODE_RPM);
- is_auto = is_automatic_control_mode(data, channel);
-
- switch (attr) {
- case hwmon_pwm_enable:
- {
- bool pwm_enabled;
-
- pwm_enabled = (data->fan_config[channel] &
- MAX31785_FAN_CFG_PWM_ENABLE);
-
- if (!pwm_enabled)
- *val = 0;
- else if (is_auto)
- *val = 3;
- else if (is_rpm)
- *val = 2;
- else
- *val = 1;
- break;
- }
- case hwmon_pwm_input:
- if (is_rpm || is_auto)
- *val = data->pwm[channel] / 100;
- else
- *val = data->fan_command[channel]
- / MAX31785_FAN_COMMAND_PWM_RATIO;
- break;
- default:
- rc = -EOPNOTSUPP;
- };
-
- mutex_unlock(&data->lock);
-
- return rc;
-}
-
-static int max31785_read(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, long *val)
-{
- struct max31785 *data;
- int rc = -EOPNOTSUPP;
-
- data = max31785_update_device(dev);
-
- if (IS_ERR(data))
- return PTR_ERR(data);
-
- switch (type) {
- case hwmon_fan:
- return max31785_read_fan(data, attr, channel, val);
- case hwmon_pwm:
- return max31785_read_pwm(data, attr, channel, val);
- default:
- break;
- }
-
- return rc;
-}
-
-static int max31785_write_fan(struct max31785 *data, u32 attr, int channel,
- long val)
-{
- int rc = -EOPNOTSUPP;
-
- switch (attr) {
- break;
- case hwmon_fan_pulses:
- return max31785_fan_set_pulses(data, channel, val);
- case hwmon_fan_target:
- return max31785_fan_set_target(data, channel, val);
- default:
- break;
- };
-
- return rc;
-}
-
-static int max31785_write_pwm(struct max31785 *data, u32 attr, int channel,
- long val)
-{
- int rc = -EOPNOTSUPP;
-
- switch (attr) {
- case hwmon_pwm_enable:
- return max31785_pwm_enable(data, channel, val);
- case hwmon_pwm_input:
- return max31785_pwm_set(data, channel, val);
- default:
- break;
- };
-
- return rc;
-}
-
-static int max31785_write(struct device *dev, enum hwmon_sensor_types type,
- u32 attr, int channel, long val)
-{
- struct max31785 *data;
- int rc = -EOPNOTSUPP;
-
- data = dev_get_drvdata(dev);
-
- switch (type) {
- case hwmon_fan:
- return max31785_write_fan(data, attr, channel, val);
- case hwmon_pwm:
- return max31785_write_pwm(data, attr, channel, val);
- default:
- break;
- }
-
- return rc;
-
-}
-
-static umode_t max31785_is_visible(const void *_data,
- enum hwmon_sensor_types type, u32 attr, int channel)
-{
- switch (type) {
- case hwmon_fan:
- switch (attr) {
- case hwmon_fan_input:
- case hwmon_fan_fault:
- return 0444;
- case hwmon_fan_pulses:
- case hwmon_fan_target:
- return 0644;
- default:
- break;
- };
- break;
- case hwmon_pwm:
- return 0644;
- default:
- break;
- };
-
- return 0;
-}
-
-static const struct hwmon_ops max31785_hwmon_ops = {
- .is_visible = max31785_is_visible,
- .read = max31785_read,
- .write = max31785_write,
-};
-
-static const struct hwmon_chip_info max31785_chip_info_0x3030 = {
- .ops = &max31785_hwmon_ops,
- .info = max31785_info_0x3030,
-};
-
-static const struct hwmon_chip_info max31785_chip_info_0x3040 = {
- .ops = &max31785_hwmon_ops,
- .info = max31785_info_0x3040,
-};
-
-
-static int max31785_get_capabilities(struct max31785 *data)
-{
- s32 rc;
-
- rc = i2c_smbus_read_word_data(data->client, MAX31785_REG_MFR_REVISION);
- if (rc < 0)
- return rc;
-
- if (rc == 0x3040)
- data->capabilities |= MAX31785_CAP_FAST_ROTOR;
-
- return 0;
-}
-
-static int max31785_init_fault_resp(struct i2c_client *client)
-{
- struct device_node *np = client->dev.of_node;
- int page;
- int rc;
-
- if (np && of_get_property(np, "fault-max-fan", NULL)) {
- for (page = 0; page < NR_CHANNEL; page++) {
-
- /* set max fans on fault */
- rc = max31785_set_page(client, page);
- if (rc < 0)
- return rc;
-
- rc = i2c_smbus_read_byte_data(client,
- MAX31785_REG_MFR_FAULT_RESP);
- if (rc < 0)
- return rc;
-
- rc |= MAX31785_FAULT_PIN_MONITOR;
- rc = i2c_smbus_write_byte_data(client,
- MAX31785_REG_MFR_FAULT_RESP, rc);
- }
- return rc;
- }
-
- return 0;
-}
-
-static int max31785_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct i2c_adapter *adapter = client->adapter;
- const struct hwmon_chip_info *chip;
- struct device *dev = &client->dev;
- struct device *hwmon_dev;
- struct max31785 *data;
- int rc;
-
- if (!i2c_check_functionality(adapter,
- I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
- return -ENODEV;
-
- data = devm_kzalloc(dev, sizeof(struct max31785), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- data->client = client;
- mutex_init(&data->lock);
-
- rc = max31785_init_fault_resp(client);
- if (rc)
- return rc;
-
- rc = max31785_get_capabilities(data);
- if (rc < 0)
- return rc;
-
- rc = max31785_init_fans(data);
- if (rc)
- return rc;
-
- if (max31785_has_dual_rotor(data))
- chip = &max31785_chip_info_0x3040;
- else
- chip = &max31785_chip_info_0x3030;
-
- hwmon_dev = devm_hwmon_device_register_with_info(dev,
- client->name, data, chip, NULL);
-
- return PTR_ERR_OR_ZERO(hwmon_dev);
-}
-
-static const struct i2c_device_id max31785_id[] = {
- { "max31785", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, max31785_id);
-
-static struct i2c_driver max31785_driver = {
- .class = I2C_CLASS_HWMON,
- .probe = max31785_probe,
- .driver = {
- .name = "max31785",
- },
- .id_table = max31785_id,
- .detect = max31785_detect,
- .address_list = normal_i2c,
-};
-
-module_i2c_driver(max31785_driver);
-
-MODULE_AUTHOR("Timothy Pearson <tpearson at raptorengineering.com>");
-MODULE_DESCRIPTION("MAX31785 sensor driver");
-MODULE_LICENSE("GPL");
--
2.11.0
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